Police arrests 12 in connection with London terror attack

May said some of those hurt had "life-threatening" conditions.

Speaking on the BBC, Mr Khan made clear that he was advising people not to be concerned by the presence of additional armed police officers on the streets of the capital in the days to come, and not playing down anxieties about the attack itself.

Ms Hedge was among scores of people hurt when a trio of extremists in a white van mowed down pedestrians on London Bridge before proceeding to the nearby Borough Market on foot, stabbing and slashing anyone in their path.

Another witness, Will Heaven, said he saw people who appeared to have been hit, and one being put into an ambulance.

He told Sky News he could not be certain it was the same person, but that it looked like a man who lived in the block.

The men went into Borough Market, but then turned around and ran toward the Wheatsheaf Pub after being confronted by a police officer, he said, and suddenly a lot of police came from the other direction.

British Prime Minister Theresa May responded on Sunday to the attacks in London, which killed seven people, declaring "enough is enough" and calling for a review of Britain's counter-terrorism strategy. There are also witness reports of stabbings in nearby Borough Market, an area that has lots of restaurants and bars and is usually packed on weekends.

London Mayor Sadiq Khan said the attackers hoped to disrupt democracy and hamper plans for voting, but that would not happen. The attacker was gunned down by a police officer.

Did you see the London Bridge terror attack, or know anyone involved?

Police also said they were responding to a third incident in Vauxhall and told anyone at the scene of the incidents to run and hide. All three were shot dead by police at the scene.

Dick said police believed the incident was under control but would need to conduct a thorough search of the area to ensure everyone was accounted for and no further suspects were at large.

Ariana Grande, the US singer whose May 22 concert in Manchester, England was hit by a suicide bombing that killed 22 people and wounded 116, tweeted "Praying for London" after Saturday's attacks.

Others offered free places to stay or to arrange rides for people who were stranded after the attack, reports The Telegraph, noting that the response mirrors the outpouring of support after Manchester.

"All Americans stand in solidarity with the people of the United Kingdom", State Department spokeswoman Heather Nauert said in the statement.

British Prime Minister May was due to chair a meeting of the government's Cobra security committee later on Sunday. He said the official threat level in Britain remained at severe, meaning a militant attack is highly likely.

  • Zachary Reyes